End A of a uniform thin rod of length 2L is in boiling water ($$100^\circ$$ C) and end B is in melting ice ($$0^\circ$$ C). P and Q are two points at distance $$\frac{L}{2}$$ from A and B respectively. A similar bent rod of length $$\frac{3L}{2}$$ of same material and equal cross section is joined to rod AB between points P and Q as shown in figure. Then

A

Temperature at P will increase and that at Q will decrease

B

Rate of flow of heat will increase by 25%

C

Rate of flow of heat will decrease by 20%

D

Rate of heat flow will increase by 37.5%